JP2814710B2 - Insulation board for both formwork - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a formwork / insulation plate which can be effectively used as an interior / exterior of a building, and more specifically, a non-combustible material using a foamed polystyrene plate as a substrate. The present invention also relates to a heat insulating plate which is also used as a mold.

[Problems to be solved by conventional technology and invention]

Conventionally, as a heat insulating plate also used as a form used for the interior and exterior of a building, a wooden plywood and a foamed resin plate are assembled and constructed on site, or disclosed in JP-A-61-294048. A heat insulating plate made of a synthetic resin foam having a reinforcing layer, a moisture-proof layer and a surface layer is known.

However, in the former method of assembling a wood plywood and a foamed resin board on site, the work at the time of construction is complicated. Further, the latter heat insulating plate cannot be manufactured inexpensively because the surface material is laminated in three layers on the surface of the synthetic resin foam.

The present invention has been made in order to solve the above-mentioned problems, and is easy to perform on-site work, and also sufficiently withstands the pressure at the time of placing concrete, and has excellent flame retardancy, and is an inexpensive heat insulating material that also serves as a formwork. The purpose is to provide a board.

[Means for solving the problem]

According to the present invention, in order to achieve the above object, a non-combustible sheet material is laminated on one or both sides of an expanded polystyrene plate with an inorganic silicate binder interposed or impregnated with the inorganic silicate binder.

Here, as the inorganic silicate binder, one formed of an inorganic silicate foamed polymer is preferable in terms of strength, weight reduction, heat resistance, heat insulation and the like. in this case,
This inorganic silicate foamed polymer can be obtained by foaming and curing an inorganic self-hardening composition containing silicate and metasilicate as main components and containing a surfactant.

As the non-combustible sheet material, a nonwoven fabric of polyester, polyethylene, polypropylene, vinylon, or glass fiber is preferably used.

[Action]

The mold and heat insulating plate of the present invention is a foamed polystyrene plate as a substrate, a non-combustible sheet material is laminated with an inorganic silicate binder or a state in which the inorganic silicate binder is impregnated, thereby increasing strength. At the same time as weight reduction is achieved, it is excellent in heat insulation, and the expanded polystyrene plate is protected with an inorganic silicate binder and a non-combustible sheet material, so it has a high incombustibility effect, and it is also good as interior and exterior of buildings It has performance. In addition, when used as a formwork, there is no need for complicated on-site assembly, and the inorganic silicate binder has high strength and sufficiently withstands the pressure during concrete placement.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the drawings.

〔Example〕

FIG. 1 shows an embodiment of a heat-insulating plate that also serves as a mold according to the present invention. The heat-heating plate also serves as a non-combustible sheet material layer on one surface of an expanded polystyrene plate 1 with an inorganic silicate binder layer 2 interposed therebetween. 3 are laminated.

FIG. 2 shows another embodiment of the present invention. In this embodiment, non-combustible sheet material layers 3, 3 each impregnated with an inorganic foam 2, 2 are laminated on both surfaces of a polystyrene foam plate 1. This is a heat-insulating plate that also serves as a formwork.

Here, the expanded polystyrene plate has a density of 0.02 to 0.06 g / cm
^Three are suitably used, and the thickness is usually 10 to 100 mm.

Further, as described above, the inorganic silicate binder is mainly composed of silicate and metasilicate, and foam-hardened an inorganic self-hardening composition containing a surfactant to have a density of 0.3 to 1 g / d. Preferably, it is formed in cm ³ .

The inorganic self-hardening composition will be described in more detail below. The composition is as follows (% indicates weight%).

Silicate 15-66%, more preferably 30-60% kaolin 0-28%, more preferably 5-20% water-soluble magnesium salt 2-20%, more preferably 0.2-0.8% silicofluoride 2-20 %, More preferably 5 to 15% metasilicate 3 to 58%, more preferably 3 to 30% surfactant 0.1 to 28%, more preferably 0.1 to 2% water 0 to 15%, more preferably 5 to 5% 13% In this case, sodium silicate is used as the silicate, magnesium chloride is used as the water-soluble magnesium salt, sodium silicate is used as the silicate, sodium metasilicate is used as the metasilicate, and sodium lauryl sulfate is used as the surfactant. The anionic surfactant is preferably used. In addition, if necessary, an inorganic or organic filler may be added to the composition.

Further, as the non-combustible sheet material, a non-woven fabric such as polyester, polypropylene, vinylon, and glass fiber is preferably used, and a non-woven fabric having a weighing of 20 to 500 g / m ² is particularly preferable.

The thickness of the inorganic silicate binder is preferably ²⁰⁰ to 2000 g / m ² as the coating amount of the inorganic self-hardening composition regardless of whether or not the non-combustible sheet material is impregnated. Also, the thickness of the non-combustible sheet material is 0.1-5
It is preferably set to mm.

In order to obtain the heat insulating board of FIG. 1, the inorganic self-hardening composition is applied on a foamed polystyrene board, a non-combustible sheet material is placed thereon, and the inorganic self-hardening composition is foamed and hardened. At this time, the noncombustible sheet material is bonded to an inorganic foam obtained by foaming and curing the inorganic self-hardening composition.
In order to obtain the heat insulating plate shown in FIG. 2, a non-combustible sheet material is placed on a foamed polystyrene plate, an inorganic self-hardening composition is applied thereto, and the non-combustible sheet material is impregnated. This is for foaming and curing the composition.

The heat insulating plate thus obtained is used as a heat insulating plate which also serves as a mold for the interior and exterior of a building. In this case, concrete is cast using the non-combustible sheet material layer as the mold surface. is there. In addition, as a method of placing concrete using this heat insulating plate as a mold, a known method can be adopted.

The configuration of the heat insulating plate of the present invention is not limited to those shown in FIGS. 1 and 2 above. For example, when a non-combustible sheet material layer is laminated on a foamed polystyrene plate via an inorganic silicate binder, As shown in the figure, the whole or a part of the non-combustible sheet material may be impregnated with an inorganic silicate binder, and other configurations may be variously changed within the scope of the present invention.

 Next, an experimental example will be described.

(Experimental example)

An inorganic silicate binder (density: 0.9 g / cm ³ ) having the following composition was applied to both sides of a 25-mm-thick expanded polystyrene plate at a thickness of 1.0 mm, and 30 g / m ² of glass paper was stuck thereon. In this way, a heat-insulating plate that also serves as a mold was produced. 45% inorganic silicate binder composition of sodium silicate kaolin 10 Magnesium chloride 0.5 silicofluoric of soda 15 metasilicate soda 20 surfactant 1.5 Water 8 Total 100.0% This formwork combined insulation plate has a bending strength 10 kg / cm ^2, Even when the flame of the torch lamp was directly applied, the portion was not damaged when the concrete was sufficiently pressured during the casting.

Incidentally, the bending strength of the foamed polystyrene sheet having a thickness of 25mm was used in this example was 3.7 kg / cm ^2, thus by forming the glass paper layer on both sides thereof through the inorganic binder, bending strength significantly enhanced It is acknowledged that it was done.

〔The invention's effect〕

As described above, the mold and heat insulating plate of the present invention is suitably used for the interior and exterior of buildings and the like, and has excellent heat insulation, fire resistance, strength, and is easy to use when used as a mold. Thus, it can sufficiently withstand the concrete placing pressure, has excellent performance as a formwork, and can be manufactured at low cost.

[Brief description of the drawings]

1 to 3 are sectional views showing an embodiment of the present invention. 1 ... expanded polystyrene plate, 2 ... inorganic foam, 3 ...
… Non-combustible sheet material

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hideo Kashiwagi 1-4-16, Nihonbashi Bakurocho, Chuo-ku, Tokyo Inside Fujimori Industries Co., Ltd. (72) Inventor Akira Takano 1-4-16 Nihonbashi Bakurocho, Chuo-ku, Tokyo Inside Fujimori Industrial Co., Ltd. (72) Inventor Terumaro Nagai 1-25-25 Nanjing Shumachi, Nara City, Nara Prefecture Sekisui Plastics Co., Ltd. (56) References JP-A-61-92809 (JP, A) JP-A-48-30722 (JP, A) JP-A-55-159919 (JP, A) JP-A-2-107403 (JP, A) JP-A-1-202432 (JP, A) JP-A-60-219011 (JP) , A) JP-A-63-161241 (JP, A) JP-A-61-294048 (JP, A) JP-A-64-27312 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB Name) B28B 7 / 34,7 / 36 E04B 1/80

Claims (2)

(57) [Claims] 1. A heat-insulating plate which also serves as a mold, wherein a non-combustible sheet material is laminated on one or both sides of an expanded polystyrene plate via an inorganic silicate binder. 2. A heat-insulating plate which is also used as a formwork, wherein a non-combustible sheet material impregnated with an inorganic silicate binder is laminated on one or both surfaces of an expanded polystyrene plate.